32 



Increase of seed cotton per acre when acid phosphate was added: 



To unfertilized plot 696 392 192 



To cotton seed meal plot 681 521 206 



To kainit plot 494 231 114 



To cotton seed meal and kainit p'ot 465 — 198 231 



Average increase with acid phosphate 584 236 188 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 334 308 179 



To cotton seed meal plot 287 270 — 79 



To acid phosphate plot 132 147 101 



To cotton seed meal and acid phosphate plot 71 — 449 — 54 



Average increase with kainit 212 69 37 



Lauderdale County_, 10 Miles West of Florence. 



J. W. Haddock, 1907-8. (See Table, p. 30.) 



Gray soil, with red suhsoil. 



This field had been cleared about 40 years, and was of 

 the same character as soil used in Mr. Parish's experiment. 

 The stand was uniform. The results both years agree with 

 Mr. Parish's experiments in showing that the most effective 

 fertilizer was a mixture of acid phosphate and cotton seed 

 meal, the phosphate being more important. It is curious 

 and iniexplicable that kainit when applied alone gave a large 

 increase, but when combined with either or both of the oth- 

 er fertilizers it gave little or no increase. These tests, 

 though presenting some figures that cannot be understood, 

 confirmed the conclusions drawn from Mr. Parish's tests, 

 namely, that acid phosphate is most important, that it 

 should be supplemented by cotton seed meal, and that pot- 

 ash is generally unnecessary. 



